Veeam has released version 13, which is no longer compatible with the current Centreon connectors.
In this version, access is only available through the REST API:
https://helpcenter.veeam.com/references/vbr/13/rest/1.3-rev0/tag/Login

Veeam is now provided as a Linux appliance with specific command sets.
Could you please consider updating the Centreon plugin to support this new version and its REST API access?